MediumTechnical

A sample throws a JSON parsing error because it received a 404 HTML page. Write a short diagnostic explanation for learners.

1Give yourself 5 minutes

2Answer out loud, not in your head

3Then compare with the answer below

Reference answer

Identify the response status/content type and verify the endpoint. If the verified route differs from the configured route, correct it and retest before changing the JSON schema. Otherwise inspect routing or intermediary error handling; a 404 HTML response alone does not prove a misspelled path. Explain that the parser surfaced an earlier request-contract failure. Add safe status handling and preserve useful evidence without tokens.

Then expect these follow-ups

What changes for 401 or 429?
How do you avoid blaming the learner?

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